McAllister

Rem McAllister took the job reluctantly. He was to lead an army mule-train laden with gold across the desert from Mesquite Springs - and he knew that with Clancy and the ruthless Franchon Gang on the rampage, and Gaton and his Apaches out for white scalps, there wasn't
much chance of its getting through.

So when the mule-train was bushwhacked, the army escort massacred, the gold stolen and he himself wounded, McAllister wasn't really surprised. Just good and mad. And out for bullet-fast revenge.